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These may include: Fatigue Brain fog Memory loss Neurological problems Heart palpitations Pale skin Muscle weakness Mood changes Appetite loss Constipation Infertility Side Effects of Vitamin B12 While the recommended daily amount of vitamin B12 for adults is 2.4 micrograms, higher doses have been found to be safe
Serum B12 peaks 2448 hours post-injection and sustains elevated levels for approximately 34 weeks
Deficiency may also result from poor absorption, which may increase as we age
Post-Bariatric Surgery and Malabsorption Syndromes People who have had bariatric surgery or have malabsorption syndromes cant absorb vitamin B12 well
Pens are shipped with ice packs to ensure proper temperature control
Nat Rev Endocrinol
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